Sioux Falls, SD

ZIP code 57117 is a special-use, PO-box ZIP associated with Sioux Falls, South Dakota, rather than a mapped residential district. Because it does not define a conventional geographic area, physical landmarks cannot reliably be assigned to it. Sioux Falls landmarks include Falls Park, the Washington Pavilion, and the Great Plains Zoo, but these are city attractions and should not be described as being within 57117 without a specific address.